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. 2020 Jan 22;10:1582. doi: 10.3389/fphys.2019.01582

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Copyright © 2020 Van Duijvenboden, Porter, Pueyo, Sampedro-Puente, Fernandez-Bes, Sidhu, Gould, Orini, Bishop, Hanson, Lambiase, Razavi, Rinaldi, Gill and Taggart.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Example ARI, SBP and dP/dt_max time series of one patient breathing at 15 breaths/min (0.25 Hz) during control and following beta-adrenergic blockade. Clear low-frequency oscillations are visible in all traces during control, which are attenuated following beta-adrenergic blockade. Also note the reduction in the short time variability (STV) measures. PSD, power spectral density.